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Charge density wave formation in R2Te5 (R=Nd, Sm, and Gd)

K. Y. Shin1, J. Laverock2, Y. Q. Wu3, C. L. Condron4, M. F. Toney4, S. B. Dugdale2, M. J. Kramer3, and I. R. Fisher1,*

  • 1Geballe Laboratory for Advanced Materials and Department of Applied Physics, Stanford University, Stanford, California 94305, USA
  • 2H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, United Kingdom
  • 3Ames Laboratory and Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011, USA
  • 4Stanford Synchrotron Radiation Laboratory, Stanford Linear Accelerator Center, 2575 Sand Hill Road, Menlo Park, California 94025, USA

  • *irfisher@stanford.edu

Phys. Rev. B 77, 165101 – Published 1 April, 2008

DOI: https://doi.org/10.1103/PhysRevB.77.165101

Abstract

The rare earth (R) tellurides R2Te5 have a crystal structure intermediate between that of RTe2 and RTe3, consisting of alternating single and double Te planes sandwiched between RTe block layers. We have successfully grown single crystals of Nd2Te5, Sm2Te5, and Gd2Te5 from a self-flux and we describe here evidence for charge density wave formation in these materials. The superlattice patterns for all three compounds are relatively complex, consisting at room temperature of at least two independent wave vectors. Consideration of the electronic structure indicates that, to a large extent, these wave vectors are separately associated with sheets of the Fermi surface which are principally derived from the single and double Te layers.

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